Removal of the Supports of the Engine Fire-Extinguisher Bottles

TASK 54-51-63-000-801-A
Removal of the Supports of the Engine Fire-Extinguisher Bottles

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: THE CARTRIDGE IS AN EXPLOSIVE DEVICE. REMOVE IT BEFORE YOU DISASSEMBLE THE FIRE EXTINGUISHER BOTTLE. TO PREVENT INJURY TO THE PERSONNEL BECAUSE OF THE EXPLOSION OF THE CARTRIDGE IF IT HAS NOT BEEN FIRED:

INSTALL A SHUNT DEVICE.
THIS WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE BEFORE ITS REMOVAL.

DO NOT USE A FOIL SHUNT.

WARNING: BE VERY CAREFUL WHEN YOU MOVE A FULL FIRE EXTINGUISHER BOTTLE. A SUDDEN OR HEAVY SHOCK TO A FULL BOTTLE CAN CAUSE UNWANTED DISCHARGE AND INJURY TO PERSONS.

WARNING: IF YOU REMOVE THE FIRE EXTINGUISHER BOTTLES IN A CLOSED HANGAR, MAKE SURE THAT THERE IS A FLOW OF NEW AIR IN THE HANGAR.

ZONE: 410
ZONE: 420
FIN: 4020KM1
FIN: 4020KM2

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
415BL, 415CR, 425BL, 425CR
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 26-21-41-000-001-F	Removal of the Engine Fire-Extinguisher Bottle
TASK 54-51-21-000-804-A	Removal of the Pylon Lateral Access-Doors
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
Supports of the Engine Fire-Extinguisher Bottles

3. Job Set-up
Subtask 54-51-63-941-050-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 54-51-63-865-050-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 6WE2 (BOTTLE 1FIRE EXTING, ENG 2) FOR FIN: 6WE1 (BOTTLE 1FIRE EXTING, ENG 1)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q42
FOR FIN: 8WE2 (BOTTLE 2FIRE EXTING, ENG 2) FOR FIN: 8WE1 (BOTTLE 2FIRE EXTING, ENG 1)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q40

Subtask 54-51-63-040-050-A

C. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.

(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 54-51-63-010-050-A

D. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(2) Open the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
(3) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.
(4) Remove the pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-804):
(a) For the left pylon: 415BL 415CR
(b) For the right pylon: 425BL 425CR.

Subtask 54-51-63-020-050-A

E. Removal of the Components
(1) Remove the engine fire-extinguisher bottles (Ref. AMM TASK 26-21-41-000-001).

4. Procedure
Subtask 54-51-63-020-051-A

A. Removal of the Supports of the Engine Fire-Extinguisher Bottles

Supports of the Engine Fire-Extinguisher Bottles

CAUTION: WHEN YOU REMOVE THE SCREWS, MAKE SURE THAT YOU RECORD THE CORRECT POSITION OF EACH OF THEM. THE SCREWS HAVE DIFFERENT LENGTHS.

(1) Hold the clamp (6) that is installed on the bracket (1).
(2) Remove the bolts (8) and the washers (7).
(3) Remove the clamp (6) from the bracket (1).
(4) Hold the bracket (1) that is installed on RIB6 of the pylon box.
(5) Remove the nuts (9) and the bolts (2) and (5).
(6) Remove the nuts (10) and the bolts (3) and (4).
(7) Remove the bracket (1) from RIB6 of the pylon box.
(8) Hold the clamp (12) that is installed on the bracket (11).
(9) Remove the bolts (14) and the washers (13).
(10) Disengage the clamp (12) from the bracket (11).
(11) Hold the bracket (11) that is installed on RIB7 of the pylon box.
(12) Remove the nuts (19) and the bolts (15) and (18).
(13) Remove the nuts (20) and the bolts (16) and (17).
(14) Remove the bracket (11) from RIB7 of the pylon box.
(15) Hold the bracket (21) that is installed on RIB8 of the pylon box.
(16) Remove the nuts (24) and the bolts (22).
(17) Remove the nuts (25) and the bolts (23).
(18) Remove the bracket (21) from RIB8 of the pylon box.

[Rev.10 from 2021] 2026.04.01 12:38:45 UTC